package com.hujf.mapreduce.combiner;

import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Reducer;

import java.io.IOException;

/**
 * @author Hujf
 * @title: WordCountCombiner
 * @date 2021/4/19:25
 * @description: TODO
 */
public class WordCountCombiner extends Reducer<Text, IntWritable,Text,IntWritable> {
    @Override
    protected void reduce(Text key, Iterable<IntWritable> values, Context context) throws IOException, InterruptedException {
        int sum =0;
        for(IntWritable value:values){
            sum+=value.get();
        }
        context.write(key,new IntWritable(sum));
    }
}
